MD2134中文资料High Speed Ultrasound Beamforming Source Driver数据手册Microchip规格书

描述 Description

The MD2134 is a high-speed source driver for use in a pulsed current waveform generator. This programmable, fast, arbitrary current level driver is designed for medical ultrasound imaging beamforming applications. It also can be used in HIFU, NDT ultrasound and other instrument applications.The MD2134 consists of CMOS digital logic input circuits, an eight-bit current DAC for aperture weighting amplitude control, and a programmable 15-level pulse amplitude modulation (PAM) current-source that does not include a zero level. The fast current sources are constructed with current-switch array, controlled by the LV0~LV15 level-register as the waveform data points. Four logic inputs M[3:0] are used for transmit data level selecting, as well as the transmitting timing control pins. Each level can be programmed to a resolution of +/-127 including zero (8-bit) in addition to an 8-bit SPI apodization DAC. The outputs PA and PB are controlled by M[3:0] pins directly, as well as the polarity-flip bit S1 in the SPI register. The high-speed SPI interface will achieve per-scan-line fast data updating for dynamically changing delay time, weighting and waveforms.The MD2134 outputs are designed to drive two very low-threshold, high-voltage depletion N-MOSFETs, such as DN2625s, as source drivers. The two DN2625 drains are connected to a center-tap RF pulse transformer. The transformer’s secondary output connects to a cable and piezoelectric or capacitive transducer as a load with a good impedance match.

特性 Features

Multiple-level ultrasound pulser
Fast switching current source for push-pull topology
250MHz maximum frequency, 4.0ns input to output delay
15 independent programmable output level registers
Pulse amplitude modulation (PAM) with 8-bit resolution
8-bit apodization DAC for peak output current via SPI
Very low second order harmonic distortion
Picoseconds time-jitter from input to output
Fast SPI write and read-back of level & DAC registers
+5.0V power supply, 2.5V CMOS logic interface
Drives DN2625 MOSFETs output up to 230VP-P
Programmable aperture windowing

简介

MD2134属于集成电路（IC）的电源管理-专用。由Microchip制造生产的MD2134电源管理 - 专用专用型电源管理集成电路 (PMIC) 用于电源的控制或操作，适合特定或小范围的目标应用，例如汽车气囊管理、电容器组平衡、AC 公共电力监控、存储器总线端接、接地故障检测、能量收集、小型引擎管理、处理器或芯片集专用电压调节、负载突降保护、触觉驱动器、热电制冷器控制等。